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Old 10-11-2017, 05:29 PM   #1
Roverfire
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Default 12' Supercharged RRS engine rattle/knock

So my wife's 12' supercharged RRS is making a slight knocking/rattle sound that seems to be coming from the front of the engine. It doesn't have that exhaust leak ticking noise but more of a rattle/knocking sound. I tried searching but didn't find anything pertaining to this.
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Old 10-11-2017, 06:11 PM   #2
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Default Re: 12' Supercharged RRS engine rattle/knock

You need to replace the supercharger nose. There is a kit available through Land Rover. It is a very common problem. You may also need to replace the timing chain tensioners and guides, but start with the supercharger. When it starts to make noise, open the oil cap (it will start to run badly), and see if the noise is more audible from inside the valve cover. If it is, then there is noise from the timing chains.
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Old 10-11-2017, 09:49 PM   #3
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Default Re: 12' Supercharged RRS engine rattle/knock

There is a thread in the RRS L320 section of the other Range Rover forum discussing this subject.
http://www.rangerovers.net/forum/9-r...tle-noise.html
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Old 10-14-2017, 12:16 AM   #4
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Default Re: 12' Supercharged RRS engine rattle/knock

Here's a video of the noise I'm referring to. https://www.youtube.com/watch?v=BqnI...ature=youtu.be
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Old 10-14-2017, 10:38 AM   #5
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Default Re: 12' Supercharged RRS engine rattle/knock

Thats's the supercharger nose.
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Old 10-14-2017, 12:21 PM   #6
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Default Re: 12' Supercharged RRS engine rattle/knock

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Thats's the supercharger nose.
Okay. Thought it might be the water pump, or hoping it was. Is this a DIY job or a dealer/repair shop job? Also best place to source a supercharger nose?
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Old 10-14-2017, 01:09 PM   #7
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Default Re: 12' Supercharged RRS engine rattle/knock

It could be both the water pump and the supercharger nose. Take the belt off and see if the water pump pulley is loose. As to doing it yourself, it's not too bad. How much of that ind of work have you done? It's about a $36,000 engine if you fuck it up.
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Old 10-14-2017, 02:13 PM   #8
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Default Re: 12' Supercharged RRS engine rattle/knock

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It could be both the water pump and the supercharger nose. Take the belt off and see if the water pump pulley is loose. As to doing it yourself, it's not too bad. How much of that ind of work have you done? It's about a $36,000 engine if you fuck it up.
Never worked on a supercharger before. Have replaced turbos(Saab), water pumps, etc before. I've owned a Discovery DI,DII and currently a LR3 and RRS now. Thought about just buying a rebuilt nose and installing it instead of trying to rebuild the current one. Will pull the belt first and check the pulleys.
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Old 10-14-2017, 04:34 PM   #9
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Default Re: 12' Supercharged RRS engine rattle/knock

I forgot about the water pump! That would be a much cheaper fix. The supercharger nose isn't too bad to do. The worst part about it is that the dowels that align it get rusty so it takes a little work to lift it up.
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Old 10-14-2017, 04:46 PM   #10
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Default Re: 12' Supercharged RRS engine rattle/knock

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I forgot about the water pump! That would be a much cheaper fix. The supercharger nose isn't too bad to do. The worst part about it is that the dowels that align it get rusty so it takes a little work to lift it up.
So it would be better to get a rebuilt one than to try and rebuilt the current nose? I've found rebuild kits online and also found a nose that has already been rebuilt.
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Old 10-14-2017, 07:14 PM   #11
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Default Re: 12' Supercharged RRS engine rattle/knock

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So it would be better to get a rebuilt one than to try and rebuilt the current nose? I've found rebuild kits online and also found a nose that has already been rebuilt.
I would get a new nose with the isolater spring from Land Rover. You could do the job I bet. Notice how the supercharger kind of splits at one of the intake runners. I split it there and that makes it a lot easier for me to get the coolant quick connect fittings that your going to need to remove. Like Jymmie said it gets kind of stuck on the dowels and guys get cut sometimes when it finally pops free.

I would try it. The only way you could really fuck anything up beyond repair is if something fell in your open ports while it's apart. I like to tape off my runners and not leave them open.
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Old 10-14-2017, 08:12 PM   #12
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Default Re: 12' Supercharged RRS engine rattle/knock

So I pulled the supercharger belt and started the car and the rattle was gone however there was a ticking sound but maybe that was just the supercharger moving from the intake air moving through it. I found this on eBay http://www.ebay.com/itm/Rebuilt-Rang...53.m1438.l2649
Here's a video of the noise with the belt removed.
https://youtu.be/gCdAbkV5eD8
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Old 10-14-2017, 08:35 PM   #13
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Default Re: 12' Supercharged RRS engine rattle/knock

Could be one of 2 things. Rattle click noise from the timing chain, guides and tensionors. It could also be normal fuel system noise. New design tensionors and blades make a big difference.

That I wouldn't recommend doing on your own. The guides and tensionors could be done without taking off the supercharger. If you wanted to put chains in then the super charger and valve covers would have to come off. I like to put chains in when they have over 60,000 miles on them.They have been known to stretch and throw cam timing faults. I think they are quieter with new chains.
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Old 10-14-2017, 08:47 PM   #14
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Default Re: 12' Supercharged RRS engine rattle/knock

sorry I didn't listen to your video. That tick sound is coming from your fan. If you have the belt off and have never heard that before it will probably go away when you have it all together. If not then you need a fan.
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Old 10-14-2017, 10:51 PM   #15
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Default Re: 12' Supercharged RRS engine rattle/knock

Do you know of a write up on how to replace the supercharger cone?
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Old 10-14-2017, 11:18 PM   #16
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Default Re: 12' Supercharged RRS engine rattle/knock

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Do you know of a write up on how to replace the supercharger cone?
I can try to send you the cartoon drawing service procedure we have to work with. It won't be like any service procedure you've ever seen though. But a guy in Russia gets the exact same comic book.No words.
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Old 10-14-2017, 11:30 PM   #17
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Default Re: 12' Supercharged RRS engine rattle/knock

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Do you know of a write up on how to replace the supercharger cone?
I just sent you a link in PM. See if it works.
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Old 10-15-2017, 01:06 AM   #18
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Default Re: 12' Supercharged RRS engine rattle/knock

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Originally Posted by discostew View Post
I can try to send you the cartoon drawing service procedure we have to work with. It won't be like any service procedure you've ever seen though. But a guy in Russia gets the exact same comic book.No words.
Thanks that would be great!
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Old 10-15-2017, 06:32 PM   #19
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Default Re: 12' Supercharged RRS engine rattle/knock

Here's a video of the play in the SC snout.https://youtu.be/o1G8OnWy6Kk
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Old 10-16-2017, 06:18 PM   #20
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Default Re: 12' Supercharged RRS engine rattle/knock

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Here's a video of the play in the SC snout.https://youtu.be/o1G8OnWy6Kk
i feel very confident in saying that is your problem. Its really not too bad to do, especially if you don't take the supercharger out of the car. The MAP sensor on the back of the supercharger is very difficult to unplug.
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Old 10-17-2017, 12:10 AM   #21
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Default Re: 12' Supercharged RRS engine rattle/knock

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Originally Posted by jymmiejamz View Post
i feel very confident in saying that is your problem. Its really not too bad to do, especially if you don't take the supercharger out of the car. The MAP sensor on the back of the supercharger is very difficult to unplug.
Can the nose be replaced with the supercharger still attached to the engine? What about this one? http://www.ebay.com/itm/Rebuilt-Rang...53.m1438.l2649
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Old 10-18-2017, 10:12 AM   #22
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Default Re: 12' Supercharged RRS engine rattle/knock

No, it has to be unbolted, but it is only a few bolts holding it in place. I would just get the correct part from Land Rover. There are two different versions of it depending on the year.
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